Fire-arch for boilers



M. LIPTAK.

FIRE ARCH FOR BOILERS. APPLICATION FILED MAR 1. I919. RENEWED DEC. |2.19|9

1 ,34'7, 5 l 4. Patented July 27, 1920.

2 SHEETS-SHEET I.

M. LIPTAK.

FIRE ARCH FOR BOILERS.

APPLICATION FILED MAR. I. 1919. RENEWED uzc. 12.19l9.

1 ,34;7 ,5 1 4;, Patented July 27, 1920.

2 SHEETSSHEET 2- zzmwdw UNITED STATES PATENT OFFICE.

MICH AEL LIPTAK, OF ST. PAUL, MINNESOTA.

FIRE-ARCH, ron BOILERS.

Application filed March 1, 1919, Serial no. 280,063. Renewed December 12, 1919.

To all whom it may concern citizen of the United States, residing at lowing to be a ing plants,

arch block, a

St. Paul, in the county of Ramsey and State of Minnesota, have invented certain new and useful Improvements in Fire-Arches for Boilers; and I do hereby declare. the folfull, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains toamake and use the same.

My invention relates to improvements in furnace arches for boilers or steam generatand generally stated, consists of the novel devices and combinations of devices hereinafter described and defined in the claims.

Some of the features herein disclosed,

are disclosed and broadly claimed in my earlier application S. N.216,152, filed February 9, 1918, entitled Fire arch for boilers.

The construction "disclosed in the said earlier application, however, is especially directed to double or multiple layer fire arches, while the present invention is directed particularly to' an improvement in what is known as simple layer arches, and has for its object, to materially improve this later noted type of arch.

The invention .is illustrated in the accompanying drawings, wherein like characters indicate like parts throu bout the several views. Referring to the rawings:-

Figure 1 is a view partly in rear elevation and partly in transverse vertical section; I

Fig. 2 is a perspective view showing a portion of the arch, some parts being sectioned and some parts being removed;

Figs. 3jto 7 inclusive are perspective views showing respectively a hanger or main supplemental arch block, a main corner block, a supplemental corner block and a crowning block,

' The furnace arch occupies the usual position between masonry, walls 8. The metallic beam structure for supporting the arch, is of the eneral character disclosed in my earlier a p icatiton above identified, and preferabl is substantially identical with the metal ic beam construction disclosed and pending. application S. N. Fug? specification of Letters Patent.

16 below the flanges 16, outstanding ribs or ledges 16", rear ends they are formedwith outstanding joint forming ledges Patented July 27, 1920.

Serial No. 344,465.

nace arch for boilers, and allowed of date, November 15, 1918.

Briefly described, this metallic frame work as illustrated in the drawings, is as follows:

Main transverse-arch supporting beams 9 have their ends embedded in walls 8. These beams 9 are preferably steel I-beams. A multiplicity of laterally spaced forwardly and rearwardly extended supplemental beams 10 are hung from the lower flanges of the said main beams. These supplemental beams are preferably cast structures, flanged at the lower edges of their webs, and at places where the supplemental beams underlie the main beams, the former are provided with horizontal laterally projecting flanges 11 These flanges 11 are slid through and interlocked with T-shaped channels formed in the under sides of bracket-like beam-hangers 12, which beam hangers on their upper faces are formed with flanges that overlap and interlock with the lower flanges of the main beams 9,

At their rear end extremities, in line with flanges 11, the supplemental beams are provided with ri grally cast coupllng sockets 13, that are formed with T-shaped channels open at the under sides. Said supplemental beamslO are provided with detachable beam tips 14, that are flanged on their lower edges like the supplemental beams, and hence, formgid and preferably inteare provided at their tops with laterally pro- I jecting flanges 16 that span the spaces between the supplemental beams 10, and rest on the lowerflanges thereof. These blocks are formed with and at their 16; while at their front ends they are formed. with undercut ledges por- The spaces between by the over-lapping tions of the hanger blocks 16 are filled in by supplemental arch forming blocks 17 which at their upper portions are provided with outstanding flanges 17 that rest on the horizontal ribs 16 of the hanger blocks 16. It will be noted that said supplemental blocks 17-, just below their flanges 17 are formed with grooves 17 into which the said flanges 16? project so as to form lapped joints between the adjacent sides of the hanger blocks and the supplementalblocks. This is important, because it cuts off and breaks what would otherwise be vertical flame passages between the sides of the blocks. tal blocks 17 are formed with outstanding ledges 17 that aline horizontally with the ledges 16 of the blocks 16, and at their front ends, said supplemental blocks are formed with undercut ledges 17 that aline horizontally with the ledges 16 of said blocks 16. When the arch forming blocks 16 and 17 are assembled, the abutting end of the hanger blocks 16 will be connected by la ped joints afforded by the over-lapping edges 16 and 16 and likewise the abutting ends of the supplemental blocks 17 will be connected by lapped joints afforded ledges 17'and'17". The hanger blocks are shown in detail in Fig. 3,-while the supplemental blocks are shown in detail in Fig. 4E.

Main corner blocks 18 are shown in detail in Fig. 5 and supplemental corner blocks 19 are shown in detail in Fig. 6. The main corner blocks 18 are of the same depth as hanger blocks 16 and have the same vertical cross-section, blocks 19 are plemental blocks 17, and have the same vertical cross-section. Described more in detail, said main corner blocks 18 at their upwhile the supplemental corner per portions have projecting flanges 18 corresponding to flanges 16*, at their sides have ribs 18 corresponding to ribs 16*, and at their front ends have undercut ledges 18 that correspond to the ledges 16 and are adapted to overlap the ledges 16 of the abutting hanger blocks 16.. These main corner blocks, however, have rounded lower rear corners and do not have ledges corresponding to the ledges 16 of the said hanger blocks. These maincorner blocks 18 when applied to the arch, rest upon the lower flanges of the beam tips 14, project rearward of the rear ends of said beam tips and are entirely below the immediately overlying crown plates. 15.

The supplemental corner blocks 19 also described more in detail, are provided at their upper portions with laterally projecting horizontal flanges 19 that correspond to the flanges 17 of the supplemental blocks 17; immediately below, said flanges 19*, are formed with grooves 19 that cor e p n At their rear ends, the supplemenof the same depth as the sup with grooves 17*, and at their front ends are formed with undercut ledges '19 that are adapted to overlap ledges 17 of abutting supplemental blocks 17. The lower their front ends will be rearward of the beam tips 14 and flush with the rear ends of the said main corner blocks. These socalled rear ends of the main and supplemental corner blocks, are, of course, exposed to the flame within the furnace. The spaces over the tops of the supplemental corner blocks and between the flan es 18 of the main corner blocks, are preferably filled in with fire clay or fire cement, indicated at 20 in Fig. 2; This, j ection of the corner blocks beyondthe beam tips 14;, gives the best kind of fire protection to the said metal beam tips.

The crowning blocks 21, shown in detail in plates 15, and the filling blocks 22 that fill in the space between the archand the boiler, are built up on these crowning blocks. The crownin blocks project forward .of the Fig. 7, are laid directly on the crownwith the procrown p ates 15, and preferably terminate nearly flush with the front ends of the corner, blocks, and are formed with slightly depending portions 21* that fill in part of the space that is immediately above the rear portions of the main corner blocks.

In this improved arch, all of the arch forming blocks proper at their under surfaces, and the corner'forming blocks also at their rear ends, are exposed to the fire,

, but the metallic beams" and the other metallic parts are keptfar from the fireand well rotected therefrom, by the arch blocks. The supplemental blocks 17 and 19' immediately underlie the supplemental beam t-ips, and all vertical joints-are broken so that there are no flame passages extending upward through the arch or through the blocks thereof, to the metallic beams. The only blocks that contact with the metal beams and are exposed to the fire, are very deep, and consequently, will not conduct much heat thereto. By hanging the supplemental blocks from the main blocks, and making the top flanges of the latter wide, the number of supplemental beams required, is reduced to half the/number that would be required in a structure where all of the hanger blocks were hung directly from metallic beams.

The above described arch, while highly efiicient and durable, may be easily and cheaply applied, and tive blocks may, easily replaced. The supplemental blocks can be easily slid endwise from the main moreover, any defecfrom time to time, be very' blocks and the main blocks thus may be easily slid endwise from between the beams; and, of course, replacement of the blocks may likewise be quickly and easily accomplished by reverse sliding directions in applying new blocks or inbuildingup the arch.

In practice I have found it advisable to form the crowning plates 15' independently of the beam tips 14, and hence, to afford good supports in the ends thereof, I provide said beam tips on the upper edges of their reduced portions with laterally projecting flanges 14*.

What I claim is j 1. A fire arch comprising laterally spaced beams, laterally spaced hanger blocks hung on said beams, and supplemental blocks underlying the respective beams in the spaces between said hanger blocks, the said hanger and supplemental blocks at their lower faces terminating in approximately the same plane and being exposed to the fire.

2. A fire arch comprising laterally spaced flanged metal beams, laterally spaced hanger blocks provided at their upper ends with projecting flanges spanning the spaces between the beams and seated on the flanges thereof, and supplemental blocks underlying the respective beamsjin the spaces between said hanger blocks, said hangerblocks and supplemental blocks being slidably interlocked at their lower faces, terminating in approximately the same plane and exposed to the fire.

3. A fire arch comprising laterally spaced flanged metal beams, hanger blocks provided at their upper ends with projecting flanges spanning the spaces between the beams slidably' seated on the flanges thereof, and supplemental blocks located below the respective beams in the spacesbetween the said hanger blocks, said hanger and supplemental blocks having sliding interlocking engagement whereby said supplemental blocks are independently replaceable, all of said blocks terminating at their lower faces;

in substantially the same plane. 7

. 4. A fire arch comprising laterally spaced beams, laterally spaced hanger blocks hung on said beams, and supplemental blocks underlying the respective beams in the spaces between said hanger blocks, the said hanger and supplemental blocks at their lower faces terminating in approximately the same plane and being exposed to the fire, said hanger blocks. having overlapping ledges at their abutting ends and said supplemental blocks having overlapping ledges at their abutting ends. 7

5. A fire arch comprising laterally spaced flanged metal beams, hanger blocks provided at their upper portions with laterally projecting flanges that span the spaces between the beams and are slidably seated on the flanges thereof, supplemental b10Qk '1Q= mately the same plane, main corner cated helow the respective beams in' the spaces between said-hanger blocks, 'said hanger and supplemental blocks having in-' joints between said blocks being offset and overlapped so as to close all vertical flame passages to said beams.

6. A fire arch comprlsingi laterally spaced flanged metal beams, hanger blocks provided at their upper portions with laterally projecting flanges that span the spaces between the beams and are slidably seated on the flanges thereof, supplemental blocksv located below the respective beams in the spaces between said hanger blocks, said hanger and supplemental blocks having interlocking sliding engagement, and terminating at their lower portions inl approxi mately the same plane, main corner blocks of approximately the same cross section as said hanger blocks: and mounted on the beams in substantially the same way, and

supplemental corner blocks of substantially the same character as said supplemental blocks, located between and 'slidably interlocked to said-main corner blocks, the lower exposed corners of said corner blocks'being rounded and all of said blocks at their lower portions terminating in approximately thesame plane.

' 7: A fire arch comprising laterally spaced flanged metal beams, hanger blocks provided at their upper portions with laterally projecting flanges that span the spaces between the beams and are slidabl seated on the flanges thereof, supplementa blocks located below the respective'beams in the spaces between said hanger :blocks, said 'hanger and supplemental blocks having in terlocking sliding engagement, and terminating at their lower portions in approxiof approximately the samecross section as said hanger blocks and mounted on the .beams in substantially the same, way, and

supplemental corner blocks of substantially the same character as said supplemental blocks, located between and slidably interlocked to said main corner blocks, the-lower locks exposed corners of said corner blocks being rounded and all of said blocks at their lower portions terminatin in approximately the same plane, the en s of sand beams terminating short of the endsgpf said corner,

blocks and the spaces between the upper portions ofsaid main andsupplemental A corner blocks, in line with; the said beams being filled in with) refractory material.

8. A fire arch comprising laterally spaced flanged metal .beams,: hanger blocks provided at their upper portions with laterally projecting flanges spannin the-spaces between the beams and slide 1y. hung on the interlocked "with the ribs of said hanger blocks, the said main and supplemental blocks at theirlower portions terminatingin approximately the same plane.

9. A fire arch comprising laterally spaced flanged metal beams having detachable end tips, hanger blocks provided at their upper portions With flanges spanning the spaces between the beams and slidably hung on the flanges of said beams, supplemental blocks located below the respective beams in the spaces between said hanger blocks and slidably interlocked to said hanger blocks, main corner blocks provided at their upper portions with flanges slidably seated on the flanges of said beam tips, supplemental corner blocks located below the respective tips in the spaces between said main corner blocks and'slidably interlocked to said main corner blocks, said beam tips terminating short of the exposed end of said corner blocks, and all of the said blocks at their lower portions terminating in approximately the same plane.

a 10. A fire arch comprising laterally spaced beams, arch forming blocks detachably hung from said beams, crowning. plates detachably seated-on the ends of said beams in planes above the upper portions of said hanger blocks, and. a wall built on said crowning plates and thereby supported above said hanger blocks.

11. A fire arch comprising laterally spaced beams having detachable beam tips, arch forming blocks detachably hung from said beams and beam tips, crowning plates detachably seated on said beam tips and located inplanes above the upper portions of said arch forming blocks, and 'a' wall supported on said crowning plates and thereby supported above said arch forming blocksf In testimony whereof I aflix my signature in presence of two witnesses.

MICHAEL LIPTAK, Witnesses CLARA DEMAREsT, F. D. MERcHAN'r. I 

